Single(TSource) Method (ParallelQuery(TSource))

ParallelEnumerable.Single<TSource> Method (ParallelQuery<TSource>)

 

Returns the only element of a parallel sequence, and throws an exception if there is not exactly one element in the sequence.

Namespace:   System.Linq
Assembly:  System.Core (in System.Core.dll)

public static TSource Single<TSource>(
	this ParallelQuery<TSource> source
)

Parameters

source
Type: System.Linq.ParallelQuery<TSource>

The sequence to return the single element of.

Return Value

Type: TSource

The single element of the input sequence.

Type Parameters

TSource

The type of the elements of source.

Exception Condition
OperationCanceledException

The query was canceled with the token passed in through WithCancellation.

ArgumentNullException

source is a null reference (Nothing in Visual Basic).

AggregateException

One or more exceptions occurred during the evaluation of the query.

InvalidOperationException

The input sequence contains more than one element. -or- The input sequence is empty.

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Windows Phone
Available since 8.1
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